calculate
Molarity of 75g of MgCl2 dissolve in 500ml
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Answer:
1.56 mol kg−1
Explanation:
molality = number of moles of solute/ mass of solvent in kg
Mass of solvent = 500 g or 0.500 kg
number of moles of MgCl2
= mass of MgCI2
/ molar mass of MgCl2
number of moles of MgCl2
= 75 g / 95.2 g
mol−1
number of moles of Mg
CI2
= 0.78 moles
molality = 0.78moles / 0.5 kg
molality = 1.56 mol kg−1
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